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Microchip Technology SST49LF016C-33-4C-EIE
- Part No.:
- SST49LF016C-33-4C-EIE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 40-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
SST49LF016C-33-4C-EIE.pdf
- Description:
- IC FLASH 16MBIT PAR 33MHZ 40TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,274
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Product details
Overview
SST49LF016C-33-4C-EIE from Microchip Technology is a 16 Mbit (2M × 8) LPC serial flash memory IC designed for system firmware storage in host controllers supporting the Low Pin Count (LPC) interface v1.1. It operates at 3.0–3.6 V, supports 33 MHz clock frequency, delivers 15.6 MB/s burst-read throughput, and features hardware write protection via WP#/AAI and TBL# pins for boot-block and main-memory sectors.
For engineers reviewing the SST49LF016C-33-4C-EIE datasheet, SST49LF016C-33-4C-EIE pinout, SST49LF016C-33-4C-EIE application, or SST49LF016C-33-4C-EIE equivalent, this device serves as a legacy LPC firmware memory solution with AAI programming mode, 256-bit Security ID, uniform 4 KByte sectors, and multi-device ID selection - critical for BIOS/UEFI, embedded controller, and industrial system firmware updates.
Technical Context
The SST49LF016C-33-4C-EIE implements a 5-signal LPC bus interface (LCLK, LAD[3:0], LFRAME#, RST#, INIT#) compliant with LPC Interface Specification v1.1, replacing 28-pin parallel flash with reduced ASIC pin count and simplified routing. It uses SuperFlash split-gate technology for fixed erase/program timing independent of cycle count.
It supports two operational modes: standard LPC mode (WP#/AAI at VIH/VIL) and Auto Address Increment (AAI) mode (WP#/AAI at 9 V), enabling rapid factory programming with multi-byte writes. Firmware Memory Read supports 1/2/4/16/128-byte transfers; Write supports 1/2/4-byte transfers only.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (2,097,152 × 8 bits) - provides sufficient space for BIOS, UEFI, and microcontroller firmware images. |
| Interface Protocol | LPC v1.1 - enables direct connection to chipset LPC buses without glue logic or level shifters. |
| Burst Read Throughput | 15.6 MB/s at 33 MHz - meets real-time firmware fetch requirements for x86-based embedded systems. |
| Supply Voltage | 3.0–3.6 V - compatible with standard 3.3 V system rails; no auxiliary voltage required. |
| Endurance & Retention | 100,000 program/erase cycles, >100 years data retention - suitable for field-upgradable firmware with infrequent updates. |
| Write Protection | Hardware block lock via WP#/AAI (main memory) and TBL# (16 KB top boot block) - prevents accidental corruption during power loss or reset. |
| Security ID | 256-bit space: 64-bit factory-unique ID + 192-bit OTP - enables secure boot key binding and device authentication. |
Pinout & Package
Package: 32-lead PLCC (Plastic Leaded Chip Carrier), RoHS-compliant, body size 11.43 mm × 11.43 mm × 3.56 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LCLK | Input clock | Synchronizes all LPC transactions; accepts 33 MHz system clock directly from host chipset. |
| LAD[3:0] | Bidirectional address/data bus | Serial 4-bit multiplexed bus carrying START, IDSEL, address, command, and data - reduces pin count vs. parallel flash. |
| LFRAME# | Frame control input | Indicates start/abort of LPC cycle; driven low by host to initiate firmware read/write sequence. |
| RST# / INIT# | Reset inputs | Dual active-low reset pins (internally OR'd); ensures reliable initialization during power-on or recovery sequences. |
| ID[3:0] | Device identification inputs | Strap pins enabling up to 16 devices on same LPC bus; boot device must be ID=0000. |
| GPI[4:0] | General-purpose inputs | Five user-configurable digital inputs readable via LPC registers - supports board-level configuration detection. |
| WP#/AAI | Mode-select / write protect | Low = hardware write protect for main memory; 9 V = AAI programming mode; VIH/VIL = LPC mode. |
| TBL# | Top block lock | Low = hardware write protection for 16 KB boot block; mandatory tie-high or tie-low - no floating allowed. |
| RY/BY# / LD# | Open-drain status outputs | RY/BY# indicates ready/busy state; LD# toggles RY/BY# function between buffer-ready and programming-complete flags in AAI mode. |
Key Features
| Feature | Design Value |
|---|---|
| LPC Burst-Read Performance | 15.6 MB/s at 33 MHz - eliminates firmware fetch bottlenecks in legacy x86 platforms with LPC-connected chipsets. |
| Auto Address Increment (AAI) | Enables high-speed factory programming at ~4 seconds chip rewrite time - reduces production test duration vs. standard byte-write. |
| Uniform 4 KByte Sectors | 35 overlay blocks including one 16 KB boot block, two 8 KB parameter blocks, one 32 KB parameter block, and thirty-one 64 KB main blocks - supports granular firmware partitioning. |
| Block Locking Registers | Per-block Read-Lock, Write-Lock, and Lock-Down protection - allows runtime firmware integrity enforcement without hardware pin dependency. |
| Security ID Space | 64-bit unique factory ID + 192-bit OTP - enables cryptographic binding of firmware images to specific hardware units. |
Applications
| BIOS/UEFI Firmware Storage | Embedded Controller (EC) Code |
|---|---|
|
Use Scenario: Storing x86 platform BIOS or UEFI firmware image accessible by host chipset during POST and boot. IC Role / Device Role / Timing Role: LPC-connected nonvolatile firmware memory providing sequential instruction fetch under LPC bus timing constraints. Use Value: Enables fast 15.6 MB/s burst reads at 33 MHz, reducing boot latency; hardware write protection prevents corruption during unexpected power loss. |
Use Scenario: Hosting firmware for laptop or server embedded controllers managing keyboard, battery, thermal, and fan functions. IC Role / Device Role / Timing Role: Standalone firmware execution memory with secure update capability via LPC interface. Use Value: 256-bit Security ID allows EC firmware signing verification; uniform 4 KB sectors support atomic firmware patching without full erase. |
| Industrial PLC Boot Memory | Legacy Server Management Engine (ME) |
|
Use Scenario: Storing boot code and configuration data for programmable logic controllers operating in harsh environments. IC Role / Device Role / Timing Role: High-reliability firmware storage with >100-year data retention and 100K-cycle endurance. Use Value: TBL# and WP#/AAI hardware locks ensure firmware immutability during brownouts; GPI[4:0] supports field-configurable I/O mapping. |
Use Scenario: Providing firmware storage for Intel Management Engine or compatible out-of-band management subsystems. IC Role / Device Role / Timing Role: Secure, low-pin-count firmware memory interfacing directly with ME's LPC host interface. Use Value: 192-bit OTP space stores ME-specific keys; multi-device ID[3:0] strapping enables dual-ME or redundant firmware configurations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LPC serial flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Winbond W25Q16DVSSIG | Quad SPI interface (not LPC); 3.3 V only; no TBL#/WP# hardware lock pins; no AAI mode; no ID[3:0] multi-device support. | Requires SPI-to-LPC bridge or host driver modification; lacks native LPC compatibility and hardware boot-block protection. | Select only if migrating to SPI-based architecture and redesigning firmware interface layer. |
| Macronix MX25L1606EM2I-12G | Standard SPI interface; 3.3 V; no LPC bus signals (LFRAME#, LAD[3:0]); no built-in Security ID; no GPI or ID pins. | Not pin- or protocol-compatible; requires complete hardware and software rework for LPC host integration. | Use only when LPC interface is unavailable and SPI is the sole supported flash interface on target platform. |
Compared with Winbond W25Q16DVSSIG and Macronix MX25L1606EM2I-12G, the SST49LF016C-33-4C-EIE delivers native LPC v1.1 compliance, hardware boot-block locking, and AAI programming - eliminating need for external logic or firmware abstraction layers in legacy x86 firmware storage designs.
Availability
SST49LF016C-33-4C-EIE is available at Aetrix Electronics and suitable for BIOS/UEFI firmware storage, embedded controller code hosting, and industrial PLC boot memory applications requiring stable component supply and long-term lifecycle support.
Supply support for SST49LF016C-33-4C-EIE includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology is a global semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with emphasis on reliability, longevity, and embedded system integration.
The SST49LF016C-33-4C-EIE belongs to Microchip's legacy LPC serial flash product line, engineered specifically for x86 platform firmware storage where low pin count, hardware write protection, and LPC v1.1 compliance are mandatory design requirements.
FAQ
What is the primary interface type and protocol compliance of the SST49LF016C-33-4C-EIE?
The SST49LF016C-33-4C-EIE implements a 5-signal Low Pin Count (LPC) interface fully compliant with LPC Interface Specification v1.1. It uses LCLK, LAD[3:0], LFRAME#, RST#, and INIT# pins to communicate with host chipsets - not SPI, QSPI, or parallel interfaces. This makes SST49LF016C-33-4C-EIE suitable only for systems with native LPC bus support, such as legacy x86 motherboards and embedded controllers.
Does the SST49LF016C-33-4C-EIE support both read and write operations at 33 MHz?
Yes, the SST49LF016C-33-4C-EIE supports full read and write functionality at 33 MHz clock frequency. Its burst-read throughput reaches 15.6 MB/s at 33 MHz, and firmware memory write cycles (1/2/4 bytes) operate synchronously with the same clock. The "-33" in SST49LF016C-33-4C-EIE explicitly denotes 33 MHz maximum clock rating - it does not support 66 MHz operation despite references to 66 MHz in broader family documentation.
How does hardware write protection work on the SST49LF016C-33-4C-EIE?
The SST49LF016C-33-4C-EIE provides dual hardware write protection: WP#/AAI pin protects all sectors except the top 16 KB boot block when pulled low, and TBL# pin protects only the top boot block when pulled low. Both pins must be actively driven (not floated) and remain stable during erase/program operations. These protections are OR'd with corresponding block-locking registers - meaning hardware assertion overrides software unlock attempts.
What package type is used for the SST49LF016C-33-4C-EIE?
The SST49LF016C-33-4C-EIE is packaged in a 32-lead Plastic Leaded Chip Carrier (PLCC) with dimensions 11.43 mm × 11.43 mm × 3.56 mm. This package is RoHS-compliant and features gull-wing leads compatible with through-hole or surface-mount assembly. It is distinct from the 32-lead TSOP and 40-lead TSOP variants offered in the same family - the "-EIE" suffix confirms the PLCC variant.
Is the SST49LF016C-33-4C-EIE still in active production?
No, the SST49LF016C-33-4C-EIE is an obsolete (EOL) device per Microchip's official documentation (DS20005029B, Feb 2016). While Aetrix Electronics maintains limited legacy inventory and offers lifecycle coordination support, new designs should consider migration paths. Microchip recommends contacting their sales team for officially endorsed replacements, as no drop-in pin- or protocol-compatible successor has been publicly designated for this specific LPC flash variant.
SST49LF016C-33-4C-EIE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST49
- Package/Case:
- 40-TFSOP (0.724", 18.40mm Width)
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 16Mbit
- Memory Organization:
- 2M x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- 33 MHz
- Write Cycle Time - Word, Page:
- 10µs
- Access Time:
- -
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-TSOP
SST49LF016C-33-4C-EIE FAQ
1.How can I place an order for SST49LF016C-33-4C-EIE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST49LF016C-33-4C-EIE on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SST49LF016C-33-4C-EIE reliable?
The price and inventory of SST49LF016C-33-4C-EIE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST49LF016C-33-4C-EIE is usually 5 days.
3.What payment methods are accepted for SST49LF016C-33-4C-EIE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST49LF016C-33-4C-EIE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST49LF016C-33-4C-EIE?
SST49LF016C-33-4C-EIE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST49LF016C-33-4C-EIE order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SST49LF016C-33-4C-EIE?
For technical support, including SST49LF016C-33-4C-EIE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST49LF016C-33-4C-EIE requirements.
6.How does Aetrix verify that SST49LF016C-33-4C-EIE is sourced from the original manufacturer or authorized distributors?
All SST49LF016C-33-4C-EIE products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SST49LF016C-33-4C-EIE meets industry standards.
7.What is the process for return or replacement of SST49LF016C-33-4C-EIE?
All SST49LF016C-33-4C-EIE units undergo pre-shipment inspection (PSI). If there is an issue with SST49LF016C-33-4C-EIE, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SST49LF016C-33-4C-EIE part is unused and in its original packaging.
Return procedure for SST49LF016C-33-4C-EIE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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